INCLUDES 8 holders, 4 Cables , 4 Modular ConnectorsPlease take a look Lightkiwi Modular Lighting Products and AccessoriesPlease search product with below ASIN Codes.B008DISZX0 - 12W Power Supply ( Up to 4Bars ) B008DIT2H8 - 36W Power Supply ( Up to 12Bars ) B008DISXTG - Cool White Color Bar B008DISX3W - Warm White Color Bar B008DISYUY - Master On/Off Switch B008DISZN0 - Dimmer Switch (includes On/Off function) B008DISWWY - Modular Corner Connector B008DISYYA - 4ways Splitter